Develop a transportation model for the given problem, including a transportation table with unit costs, supplies, and demands.

Here's the solution to the transportation problem:

Part a) Develop the problem as a transportation model

The problem can be represented by the following transportation table, showing the unit transportation costs, supplies, and demands.

\begin{array}{|c|c|c|c|c|} \hline From \ To & Awassa (100) & Bahir Dar (200) & Addis Abeba (120) & Supply \\ \hline Jimma (80) & 60 & 90 & 40 & 80 \\ \hline Harer (160) &